Bag making machine



BAG MAKING MACHINE original Filed may 1e. 1931 9 s nets-sheet 1 h BY N `Fam. 16, 1934. G. w. PoPPE BAG MAKING MACHINE' original Filed nay 16.

1931 9 Sheets-Sheet 2 INVENTOR '6k-0R65 W @HD5 ATTORNEY Jan. 16, 1934. G. w. PoPPE BAG MAKING MACHINE Y Original Filed May 16. 1931 9 Sheets-Sheet 3 INVENTOR faaf WPO/Pf .BW A

ATTORNEYS Jan. 16, 1934. G. w. PoPPE BAG MAKING MACHINE 9 sheets-sheet 4 Original Filed MayV 16. 1931 INVENTOR Gia/wf n( Rap/f l @www ArroRNEYs `Fam. 16, 1934. G. w. PoPPE 1,943,549

BAG MAKING MACHINE Original Filed May 16. 1951 9 Sheets-Sheet 5 9 IlA INVENTOR @fa/mf M /DaP/Qf @www ATTORN EYJ` G.VY POPPE 5am. E6, 1934.

BAG MAKING MACHINE Original Filed May 16. 1931 9 Sheets-Sheet 6l \IIIIIII'II|IIIII|I"||IIII INVENTOR G50/P65 h//D/PPE www ATTORNEYS Jan. 16, 1934. Q w, POPPE 1,943,549

BAG MAKING MAcHINE original Filed nay ya, 19's; 9 sheets-sheet Y INVENTOR afa/wf h/ Pa/f ATToRNEY` Jan. 16, 19341. G, w, POPPE 1,943,549

BAG MAKING MACHINE Original Filed llay- 16, 1931 9 Sheets-Sheet 8 INVENTOR 6`0fP6 l/l/. PoP/DE ATTORNEYS BAY/idw Jan. 16, i934. G. w. POPPE I BAG' MAKING MACHINE Original filed Ilay 16. 1931 lNVENTOR @farai h/ ,pa/@Pf ATTORNEYS Patented Jan. 16, 1934 UNITED STATES PATENT OFFICE 1,943,549 BAG MAKING MACHINE original applications May 16, 1931,Y serial No.

537,844, and August 555,893. Divided and 8, v1931, Serial No. this application June 16,

1932. Serial No. 617,544

This invention relates to a machine for making paper receptacles such as paper bags, bag envelopes and the like and one of the objects is to produce an article of this type requiring less paper for the same length of receptacle than has heretofore been found necessary.

To this end a feature of the invention relates to an improved machine for the production of a bag or bag envelope in which the bottom fold is shorter than in bags of the ordinary type;

Another feature of the invention relates to a machine for the production, in a single operation, of a bag envelope having a short bottom fold and a long closing iiap.

Another feature of the invention is the provision in a machine for making a bag envelope having a long closing ap, of means whereby the flap is scored and slitted and in which the walls of the bag are partially or wholly cut through to form an opening for a tongue.

A further feature of the invention resides in a machine for the production of a bag or bag en- A velope having a short bottom fold at a rapid rate and with high efficiency.

This application is a composite division of my application Serial No. 537,844, led May 16, 1931, Paper bag and machine for making same, and my application Serial No. 555,893, flied August 8, 1931, Process and machine for long lip bag.

Flat paper bags made from a bag tube have long been used and high speed machines have been developed for their production. Such a bag is cut from a continuous tube, the closing ap of one bag being cut out of one wall while the bottom flap of the other bag is cut as a prolongation of the other wall. In the automatic may chines used in making bags of this character the bottom of the bag is forced into a clamp by a member known as a tucker blade and in the practice of bag-making, insofar as I am aware, it has been found necessary to make the bottom fold at such a distance from the bottom edge that both walls of the bag are held by the clamp. In my improved construction it is not necessary to hold both walls in order to produce a bag as perfectly and as rapidly as such bags may be produced by the ordinary methods. Moreover, my improved bag has a shorter bottom fold and therefore requires less paper for its production than a bag of the same length produced by the methods at present known.

It is customaryv to provide some sort of hand hold for bags and these are made in various ways as by punching holes in the bag walls and providing a tongue which may be passed through (ci. :i3-18)' the wall opening and through which the finger or fingers may be inserted for carrying the bag. The present invention provides means for performing this operation on the bag during its process of manufacture.

My improved machine accomplishes the various objects with but slight changes in the machinery usually employed for bag making purposes but in which the percentage of perfect bags is equal to, if not greater than, those produced by ma- @5 chines in present use.

Various other features and advantages will become apparent from the following description and claims when taken in connection'with the accompanying drawings, in whichv Figure l is a longitudinal sectional view of an ordinary bag machine modified according to the presen-t invention;

Figure 2 is a section on line 2 2, Figure 1;

Figure 3 is an enlarged section of the portion 75 of the mechanism shown at the left of Figure 1 and at an operative stage of the machine somewhat later than that depicted in Figure 1;

Figure 4 is a view similar to Figure 3 but showing parts in elevation and at a still later stage in the operation;

Figure 5 is a still later stage in the operation of the same mechanism;

Figure 6 is an elevation as viewed along the line 6 6, Figure 3;

Figure 7 is a view taken on the line 7 7, Figure 3; l

Figure 8 is a fragmentary section on the line 8 8, Figure 5;

Figures 9 and 1.0 are reduced views taken on 90 the lines 9 9 and 10-10, respectively, of Figure 5;

Figure 1l is a view similar to Figure 10 with some of the parts removed;

Figure 12 is a view taken on the line 12 12, 95 Figure 1;

Figure 13 is a diagrammatic view-showing the formation oi the bag tube and the severing thereof into bag lengths;

Figure 14 is a view of the bottom of a bag be- 100 fore folding and illustrates the position of the line of fold in the ordinary type bag; and

Figure 15 is a similar view showing the position of the line of fold in a bag of the present invention;

Figure 16 shows a modification of the mechanism for producing the bottom fold of the bag and corresponds exactly with Figure 10 of my aforesaid application Serial No. 555,893;

Figure 17 is a diagrammatic view showing the 11 nished bag just` prior to the making of the bottom fold; and

Figure 18 is a diagrammatic view showing the nnished bag but one in which the finger hold and slits are omitted.

Figures 17 and 18 correspond exactly to Figures 16 and 17 in my application Serial No. 555,893.

The machine for making the improved receptacle according to the present invention, is a bag machine of usual and well-known construction, and I shall rst describe the usual mechanism of such machine and then describe the modifications necessary to enable it to produce the bag in its improved form.

Referring to Figure 1, there is a supporting frame work 2 and running transversely between the side members of such frame work are a number of shafts suitably driven from a motor indicated at 4, Figure 2, the shaft of which carries a pulley 5, connected by a belt 6 to a pulley 7 on a shaft 8. This shaft also carries a pulley 9 over which passes belt 10 connected to another pulley l1 on a shaft 12. The shaft 12 is geared to a shaft 13 carrying a belt 14 which passes over a pulley 15 on a shaft 16. The paper from which the bags are to be formed is fed as a web 18 from a roll 19 supported on a shaft 20 carried by a frame of the machine. 'Ihe web passes between a platen roll 22 and a printing roll 24.`

The web passes over a guide roller 25 and around another roller 26 which reverses its direction of movement, the latter roller being supported by shaft 27. As the web passes about the roller 26, paste is applied from a paste pot 28 into which dips a narrow disc 29. The paper web, after passing over the roller 26, is delivered to mechanism which folds the paper into a bag tube. This mechanism includes a former plate 30, the right hand end of which, as shown in Figure 1, is bent upwardly at an angle of about 45. The former plate is supported by arms 32 extending forwardly and upwardly from the frame members.

'Ihe web of paper passes under the former plate and is folded over onto it as indicated in Figure 2, rollers 33 aiding in this operation.- The folded tube then passes between feed rollers 34. The lower roller is mounted on a shaft 35 which is geared to shaft 8 through a wide faced gear 36, intermediategear 37 and change gears 38, Figure 2. The upper feed roller 34 is geared to the lower roller through gears 35a and 35h, Figure 2. Beyond the feed rollers 34 the tube is momentarily retarded by the rotary members 39 known in the art as pinch bars. 'Ihese are in fact rollers having segments set into a short portion of their periphery and geared together so that they rotate in opposite directions. The end of the former indicated at 40 is provided with a serrated edge and constitutes one of the knives by which the tube is severed. There is also provided a second knife 42 also having a serrated edge. When the bag tube is retarded by the pinch bars as indicated in Figure 1, a striker bar 44 gives the tube a sharp blow from beneath. 'Ihe lower wall of the tube is severed by the edge 40 and the upper wall by the edge 42. Figure 13 shows a bag length which has just been severed and corresponds to the condi tion indicated in Figure l. The serrated knife edges 40 and 42 may both be straight -or one of them may be slightly curved according to the type of bag it is desired to produce.

The present invention is not restricted to the production of any particular type of bag. For

convenience of description, however, the drawings show a type of bag such as is described in my Patent Number 1,798,168, granted March 31, 1931. In the making of a bag such as therein described, the web is preliminarily slit or cut at intervals as shown in Figure 13 and the knife edges 40 and 42 are at such a distance apart that the transverse cuts made by the knives meetv the ends of the slits. There results therefore a bag such as shown in Figure 13 with a long closing flap having a straight upper edge and slanting side edges. The part to be folded over to form the bottom has been cut out of the tube. This method of making a bag from a tube results in the formation of gussets 45 at the bottom of the bag which are shown in Figure 13.

The striker bar 44 is attached to a. sprocket chain 46, which chain passes over sprocket wheels 47 and 48, Figure 1.

The mechanism so far described is an ordinary bag machine except for the changes necessary to produce the type of bag shown in my said patent. To make this particular type of bag the oblique cuts shown at 50, Figure 13, are formed in the web and this may be done in the same manner as described in said patent. I have shown for this purpose a pair of dies 52 secured to the shaft 16, Figure 12. The knife edges 40 and 42 must also be spaced apart the proper distance.

Before describing the construction whereby the bag of the present invention is produced, it

may be advantageous to consider the formation of the bottom fold. In bag machines, the bag, after having been severed from the tube as indicated in Figure 1, passes between rollers which fold the bottom and this is done by means of a clamp and tucker blade. Just before the end of the bag enters the clamp, however, a line of paste is applied as indicated at 53, Figure 14. In prior machines, as far as I am aware, it is necessary to fold the bag along the line a-a, Figure 14, so that the upper wall of the bag which contains the longitudinal paste seam 54 may be engaged by the clamp. If the .bag bottom were folded along the line b-b, Figure 15, for instance, a longer bag could be made with the same amount of paper but heretofore difiiculty has been experienced if it is attempted to make the fold along this line because the upper wall. of the bag is not held by the clamp. Ihe paste bar after applying the line of paste is moved away from the bag wall and has a tendency to lift the free wall of the bag and cause it to be folded irregularly and of course such bags must be discarded.

The present invention provides for. making a fold at the line indicated byb-fb, Figure 15, Without any danger of spoiling the bag by improper folding due to the condition just above outlined.

The means for accomplishing this will now be described.

Extending transversely of the machine and supported in the side frames thereof is a shaft 56 carrying, a gear 57 meshing with a gear 57a on shaft 80, the latter gear meshing with a Ygear 58 on a stub shaft. The gear 58 meshes with a gear 59 on the shaft 8, Figure 2. The shaft 56 carries a cylinder 60 having end plates 62, the main body of the cylinder being suitably recessed for supporting a paste bar 63, a presser foot 64 and a tucker blade 65, Figures 1 and 3. The paste bar is usually of brass and is secured to a bar 66, preferably of steel. The small bolts 67 serve to secure the paste bar to the steel bar. 'Ihis latter bar is provided at each end with a roller 68,

Figure 6, and these rollers are adapted to be en` gaged by fingers 69, Figure 4, secured to a shaft extending through the cylinder as shown in Figure 6. 'Ihe bar 64 is urged radially outwardly by springs 72 engaging it near its ends as shown in Figure 7, these springs being set in recesses in the end plates 62 of the cylinder` 60. The shaft 70 has secured to it an arm 73 whose inner end carries a roller 74 engaging a cam 75 shown at the left in Figure 6 and in a position to act on the roller 74 and move it outwardly thereby retracting the paste bar.

The presser foot 64 is urged in a substantially radial direction by springs 71 housed in recesses in the ends 62 of the cylinder 60, and is provided with a forwardly projecting lower portion as indicated in Figure 3. The presser foot is normally held by its springs a slight distance beyond the periphery of the cylinder ready to engage a bag as soon as it is released by the pinch bars 39 as shown in Figure l. Just as the bag reaches a somewhat later stage than that shown in Figure 1, the tucker blade acts to tuck it into a clamp in the lower roller, which will be later described, and at this stage in the formation of the bag bottom the parts are positioned as indicated in Figure 3. It will be noted that the tucker blade has forced a portion of the lower end of the bag into the clamp while at the. same time the presser foot has engaged the edge of the upper wall of the bag. The paste bar is about to apply a line of paste to the upper wall of the bag. An instant later the paste has been applied and the cam 75 withdraws the paste bar but the upper bag wall is at this time engaged by the presser foot and therefore cannot follow the paste bar as the latter is withdrawn. The paste bar is withdrawn during the interval of travel of the cylinder from Figure 3 position to a little beyond Figure 4 position. In the latter position the presser foot is just about leaving the bag. During the travel of the cylinder 60 from the Figure 4 position to the Figure 5 position, the paste bar is again protruded beyond the cylinder surface due to the shape of the cam 74 which permits the spring 72 to act and eject the paste bar radially for the purpose of taking off paste from a roller 76, Figure 1, applied from a paste pot 77 as is usual in machines of this character.

The lower cylinder 78, Figure 3, is mounted on a hollow shaft 80 and carries the clamp 8l consisting of a bar extending along a slot in a shaft 82 mounted in a block 83 secured to the cylinder '78. The clamp is of the usual and well-known construction and includes an arm 83a projecting from the shaft 82, the arm being connected by a spring 84 to normally hold the clamp in closed position, there being a slight movement of the shaft 82 which is permitted by a recess in the block 83 as shown in Figures 3 and 4. The shaft 82 carries an arm shown in dotted lines in Figure 3 indicated by the numeral 85. Astationary cam 86 shown in dotted lines, Figure 4, acts on a roller carried by the arm to rock the shaft 82 to open the clamp at the proper time. From the positionlfof the parts shown in the Figure 4 it will be noted that the cam 86 is not quite in position to open the clamp but said action will occur in a slightly later stage in the movement of the parts. The timing is such that as the cylinder 78 rotates slightly further than the position shown in Figure 4 the clamp will be opened and the bottom of the bag will be engaged between the cylinder 78 and the pressure roller 87 suitably supported on arms 88 carried by a rod 89. Stripper fingers 90 engage circumferential grooves in the cylinder 78 and these act to divert the bag from the cylinder surface andto a 'delivery platform.

The lower cylinder 78 in addition to carrying the clamp also furnishes the support for devices for punching a finger hold in the bag, ffor slitting the upper flap of the bag, and for making a score along the base of this upper flap. Referring to Figure 3, 91 indicates a punch which consists of a shouldered cylindrical block 92 having a. beveled circular edge which acts as a die and is in fact atube with acutting edge. Thisis sh own more clearly in the small detailed view Figure 8.

The block 92 is carried by a segmental piece 93 which in turn is carried by a piece 93a, the latter fitting into a dove-tailed groove 93b in the cylinder surface. Screws 94 pass through the piece 93 and into the piece 93a and hold the punch in its various adjusted positions, see Figures 3, 5 and 8. The punch may present a cutting edge throughout its entire circumference, in which event a hole would be punched through the bag walls, or said punch may have a portion of its periphery slightly depressed so that a tab would be formed in the bag Walls. Either construction is within the terms of the present disclosure although for illustrated purposes we have shownJ the punch with a continuous cutting edge. Circular chips of paper will therefore be cut out of the bag walls at each operation of the punch and these chips will pass through the punch and through a conveyor tube 95 secured in an open'- ing in the segment 93a. The tube 95 leads to the hollow shaft of the cylinder 78 as shown in Figure 3.

Figure 5 shows the lower cylinder with the punch in its operative position and in the act of severing the walls of a bag near the upper portion thereof. The closing flap of the bag is also shown to indicate the approximate position of the punched hole although by reason of the adjustability of the punch the position may be varied. When the punch is in the position shown in Figure 5 the upper cylinder. 60 presents a surface 96 in apposition to the cutting edge of [the punch.A .This surface may consist of a piece of fibre or other relatively soft material which is slidable in a dove-tailed slot extending longitudinally of the cylinder surface as indicated in Figure 9.

Immediately after punching the bag the upper flap is scored. For this purpose there is provided a scoring blade 97 screwed to a bar 98 which extends lengthwise of the cylinder as shown in Figure 10. The bar 98 has segmental strips 98a formed as a part thereof, Figure 10, and these are secured by screws to slide blocks 98h adjustable along dove-tailed grooves 98o, Figure 4.

After the scoring takes place the upper edge of the bag flap is slit as indicated at 99, Figure 13, by slitter knives 100 secured to a block 101, Figures 3, 4 and 5. The latter may be clamped to a dove-tailed block 101a slidable in the groove 93h.

The upper cylinder 60 carries a plate 1017) having grooves 101e which register with the slitter knives 100, Figures 5 and 6. The plate 101e is made removable to enable plates of differently separated grooves to be used at will. The knives 100 are also removable with the plate 101 for the same reason.

The surface 96 is set into a segment 101d carried by blocks 101e adjustable along a slot 101i. '.ft'

is made to4 register with the scoring blade 97.

Figure 3 shows a bag which is being slit by the slitter knives 100. The scoring blade 97 has previously made the score indicated at 103 in the flap just above the top of the front bag wall. The finished bags are fed out on to a table or conveyor for packing in any desired manner.

The above described mechanism shown in Figures 1 to 15 is the same as that described in my application 537,844. By it a completely finished bag is formed, the bottom of which is folded along a line indicated by b-b, Figure 15, instead of along the line a-a as has been the practice heretofore and which method of folding is shown in Figure 14. A bag made according to the present construction therefore may be made longer than a bag made in the ordinary way, or conversely a bag of given length,`made according to the present disclosure, requires less paper than a bag made according to prior methods and machines.

It will be noted that in Figures 14 and 15 gussets 45 are formedv and when the bottom of the bag is folded over and pasted along the line 53, Figure 15, the construction so far described provides no means whereby the gussets are fastened down.

In Figure 16 I have shown a modified form of paste bar mechanism in which two auxiliary paste applying devices are adjustably secured to the paste bar for applying paste to the gussets.

The mechanism shown in Figure 16 comprises an upper cylinder 158 similar to the cylinder 60 described in connection with Figures 1 to 15 and also includes a lower cylinder 156 similar to the lower cylinder 78 of the previously described construction. These cylinders are geared together as previously described, the principal difference between the construction described in Figures 1 to 15 and that shown in Figure 16 being in the modification of the paste bar mechanism and in the provision of the auxiliary paste bars for applying paste to the gussets.

For convenience in description and also to preserve an exact parallel between the disclosure in the present case and the disclosure in my application Serial No. 555,893.01 which the showing in Figures 16, 17 and 18 division matter, I have numberedgthe parts in Figures 16, 17 and 18 to correspond with similar parts in Figures 10, 16 and 17 of my prior application except that I have applied a 1 in front of the highest digit. For instance, the upper cylinder is numbered 58 in the parent application while in the present division it is given the number 158. The same notation is applied to all of the parts concerned with the upper and lower cylinders. The mechanism to the right of these cylinders is not an essential part of the present case and the numbers there indicated are the same as those in the parent application.

The cylinder 158 carries a tucker blade 172 which is of the usual and well known construction. It cooperates with a clamp 174 in the lower cylinder 156, the two cooperating to make the fold in the bag bottom in the well known way.

The details for operating the clamp 174 have been already described in connection with the form of construction shown in Figures 1 to 12. The cylinder 158 carries a paste bar 178 attached to a bar by screws 182, the bar 180 running longitudinally of the cylinden The paste bar is moved in the same manner as previously described by a cam which engages a roller se- 1,943,549 'Ihe plate 101d is recessed at 101g which recess.

cured to a shaft 186 which carries at the other end an arm 187 which engages rollers 187e mounted on the bar 180. The cam which governs the movement of the roller 185 is of such contour and is so positioned that the paste bar is withdrawn from its paste applying position immediately after the line of paste has been applied to the bag wall. Such withdrawal is necessary to prevent interference with the lower cylinder. However, immediately after the cylinder 158 is rotated sufliciently to take the paste bar out of the zone of the paper the paste bar is moved by springs to a position ready to contact with the paste applying roller such as has been previously described and which is shown in Figure 1.

The two auxiliary paste applying devices already referred to are shown at 192 and are adjustably secured to the bar 180 as shown in Figure 16. Each of these devices consists of a bent bar of small diameter having a paste applying end 194 by which a small spot of paste is applied to the gussets at the bag bottom.

The presserfoot 196 engages the bag tube at the proper timeA to prevent the paper web of the tube from following the paste bar 178 as the latter is withdrawn from the paper. The construction shown in Figure 16 is somewhat modified from that previously described. Referring to Figure 17, the line of paste applied by the paste bar 178 is shown at 1100; the line of fold is indicated at a-a. In other words, the tucker blade 172 contacts with the bag along the line a a. It w.1l be noticed that the bottom of the bag is quite large due to the fact ,that the portion cut out is of the same size as the upper or closing ap and the bag which is made by the machine of my application Serial No. 555,893, has an exceptionally large closing flap.

The desirability, however, of paste bar mechanism applies to small lip bags as well. It is desirable that the bottom ap may be made as small as possible consistent with the proper seal'ng of the bottom and from Figure 17 it will also be observed that that portion only of the upper wall which includes a gusset 199 is inserted within the clamp by the tucker blade. The main part of the upper wall of the bag is not tucked in and hence there is danger of the upper wall following the paste bar as the paste bar is withdrawn and this is more particularly true when the bottom iiap is large. The presserfoot is urged in a radial direction by springs 1101, Figure 16, housed in a recess -in the ends of a cylinder 158'. The presserfoot is normally held by its springs a slight d'stance beyond the circumference of the cylinder ready to engage the bag as soon as it is in proper position. Just as in the previously described form the presserfoot holds the wall of the bag down until the paste bar has the auxiliary been withdrawn from the surface of the bag wall.

The modification referred to in the presserfoot construction consists in providing three grooves at intervals along the bottom. Bent wires of small diameter 1102 are secured by screws 1103 on the back of the presserfoot and their bent ends lie in grooves in the presserfoot and pass through slots 1104 in the paste bar 178.

The function of the auxiliary paste devices 192 is to put a spot of paste on each of the gussets .V199 and these paste spots are shown at 1105, Figure 17. The bottom of the bag is therefore not only pasted along the line 1100 but the gussets themselves are pasted together at the points 1105, thereby producing a more effectively sealed battom.

What I claim is:-

1. In a bag machine, in the combination, mechanism for folding the bottom ap of a bag including a clamp and tucker blade and means for conveying a bag to said folding mechanism so that only the i'lap is engaged vwiththe clamp, a

reciprocatory paste bar for applying paste to the bag Wall for securing the apthereto and means for engaging said wall during withdrawal of the paste bar.

2. In a bag machine, in combination, mechanism for folding the bottom nap of a bag including a clamp and tucker blade .and means for conveying a bag to said folding mechanism so that only the fiap is engaged reciprocatory paste bar for applying paste to the bag wall for lsecuring the flap thereto and means including a spring urged p'resser foot for engaging said `wall during the vwithdrawal of the paste bar.

3. In a bag machine the combinaton with mechanism for forming a bag having a bottom ilap and a closing ap and for folding the bag bottom, including a clamp into which the bot- 5 tom fold is tucked; of a cylinder carrying said clamp a'nd means also carried by said cylinder Ior punchingthe bag walls and for scoring the closing nap. v i

4. In a bag machine the combination with mechanism for forming a bag having a bottom flap and a closing ap and for folding the bag V "le with the clamp, a,

bottom, including a clamp into which the bottom fold is tucked; of .a cylinder carrying said clamp and means also carried by said cylinder for slitting the closing flap.

5. In a bag machine the lcombination with mechanism for forming a bag having a bottom flap and a closing flap and for folding the bag bottom, including a clamp into which the bottom fold is tucked; of a cylinder carrying sa'ld clamp and means also carried by said cylinder for punching the bag walls and for scoring and vslitting thev closing ap.

6. In a bag machine, the combination with mechanism for folding the bottom flap of a bag, including a clamp and a tucker blade and means for conveying -a bag 'to said folding mechanism so that only the flap is engaged with the-clamp;

of a reciprocatory paste bar for applying paste4 to the bag wall for securing the flap thereto and means in the rear of the paste bar and extending beyond the same for engaging saidV wall during withdrawal of said paste bar.

'7. In a bag machine the combination with mechanism for forming the bottom ap of a bag, said bottom ap having side gussets; of a paste bar for applying a line of paste transversely of the bag wall for securing the flap thereto and auxiliary means for applying a spot of paste to each side gusset below the said line of paste.

GEORGE W. POPPE.

'ias 

